PDF Compressor
Reduce the file size of your PDF documents while maintaining quality. Perfect for email attachments and web uploads.
Key Capabilities
Three compression levels
Choose between light compression (minimal quality loss, ~20-30% size reduction), standard compression (good balance), and maximum compression (smallest possible file).
Image downsampling with quality preview
The tool downsamples images to the resolution appropriate for your chosen output use while leaving text elements at full sharpness.
Removes redundant metadata and embedded fonts
The compressor strips unused embedded fonts, duplicate image data, and document history metadata that bloats the file.
How to Use
Upload your PDF
Upload the PDF and note the original file size displayed in the tool.
Select compression level and preview
Choose your compression level. Use the preview feature to inspect a sample page.
Download and verify
Click Compress PDF to run the optimisation and download the result.
Common Use Cases
- Architects sharing large drawing sets via emailA project architect who needs to email construction drawings can compress the PDF to under 10MB to make it sendable.
- HR departments uploading CVs to ATS systemsA candidate whose portfolio PDF is rejected for being over 5MB can compress it to meet the requirement.
- Publishers archiving backlist titlesA publisher converting a print backlist to e-book PDFs needs files that download quickly on mobile connections.
Frequently Asked Questions
Will compressing the PDF make it blurry?
Our compression engine targets the embedded images within the PDF, which cause most file bloat. Vector graphics and text remain perfectly sharp. Images will be optimized for web transmission, meaning they compress significantly but remain completely legible.
Who uses the PDF compressor?
Administrative assistants shrink large reports to bypass email attachment limits (usually 25MB). Web developers compress marketing PDFs to improve website loading speeds. Paralegals shrink evidentiary documents to meet court e-filing file size caps.
How much smaller will my PDF get?
The compression ratio depends on the original file. Image-heavy PDFs or scanned documents can often be reduced by 40–70%. Text-heavy PDFs that are already optimized may only see a 10–20% reduction.
Are my confidential PDFs safe?
Yes. The data compression runs entirely inside your browser via WebAssembly. Your corporate financial sheets, NDAs, and proprietary blueprints are never uploaded to any external server.
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Trusted by students, freelancers & businesses
Real feedback from people who use DoctorDocs every day.
"Construction drawings exported from AutoCAD routinely come out at 80–100 MB. Most client portals cap uploads at 25 MB. I run them through here and get files under 10 MB with no visible loss in drawing quality. It's part of my standard export process now."
"US university portals are notoriously strict about file size limits for transcripts and SOPs. I help students compress their documents before uploading so they don't get error messages at the last minute. Reliable every single time."
"My pension documents are scanned at very high resolution and end up as huge files. I needed to email them to my bank but the attachment was too large. This compressed a 45 MB PDF down to 4 MB without making the text unreadable. Simple enough for me to use without any help."